简介：Copper（Ⅱ）oxideinvaryingratioswascombinedwitheitheranalumina-basedcement（Al300）,orCaOderivedfromlimestoneassupportmaterialinamechanicalpelletiser.Thisproductionmethodwasusedtoinvestigateitsinfluenceonpossiblemechanicalandchemicalimprovementsforoxygencarriersinchemicalloopingprocesses.Thesematerialsweretestedinalab-scalefluidisedbedwithCOorCH4asareducinggasat950°C.Asexpected,theoxygencarrierscontainingagreaterratioofsupportmaterialexhibitedanenhancedcrushingstrength.Oxygencarrierscomprisedofa1:3ratioofsupportmaterialtoactiveCuOexhibitedincreasedcrushingstrengthbyaminimumof280%comparedtopureCuOpellets.AlloxygencarriersexhibitedahighCOconversionyieldandwerefullyreduciblefromCuOtoCu.Fortheinitialredoxcycle,Al300-supportedoxygencarriersshowedthehighestfuelandoxygencarrierconversion.Thegeneraltrendobservedwasadeclineinconversionwithanincreasingnumberofredoxcycles.InthecaseofCaO-supportedoxygencarriers,allbutoneoftheoxygencarrierssufferedagglomeration.TheagglomerationwasmoresevereincarrierswithhigherratiosofCuO.OxygencarrierCu25Al75（75wt%aluminatecementand25wt%CuO）,whichdidnotsufferfromagglomeration,showedthehighestattritionwithalossofapproximately8%ofitsinitialmassover25redoxcycles.ThereducibilityoftheoxygencarrierswaslimitedwithCH4incomparisontoCO.CH4conversionwere15%-25%and50%forCu25Ca75（25wt%CuOand75wt%CaO）andCu25Al75,respectively.Cu25Ca75demonstratedimprovedconversion,whereasCu25Al75exhibitedatrendingdecreaseinconversionwithincreasingredoxcycles.

简介：ThePulangporphyrycopperdeposit,locatedintheGezantectonic-magmaticarcandsouthoftheYidunislandarc,southwestofSanjiangmetallogenicbeltinYunnanprovince,isasuper-largeporphyrycopperdeposit.Duringrecentdecades,thePulangdeposithasattractedwideattentionamonggeologistsbothathomeandabroad.Manypreviousresearcheshavediscussedits更多还原

简介：

简介：HeavymetalconcentrationsweremeasuredintheChangjiangEstuaryanditsadjacentwaters.ResultsfromasystematicsurveyinApril2002toMarch2003indicatethattherangesoftheconcentrationsofdissolvedcopper,lead,zincandcadmiuminthestudywatersare1.01~6.86,0.10~0.39,3.17~9.12and0.011~0.049μg/dm3,respectively.Similartozinc,thebehaviorofdissolvedcopperwasessentiallyconservative,buthighscatterhasbeenobservedforhighsalinitysamples,whichcanbeattributedtothedecompositionormineralizationoforganicmatterbybacteria.Dissolvedleadmayhaveactivebehaviorwithanadditionathighsalinity.Overallconcentrationsofdissolvedcadmiumincreasewithsalinity.Themeanvaluesofthesedissolvedmetalscalculatedforthesurfacewaterswerehigherthanthoseforthemiddleandbottomones.Externalinputsofdissolvedheavymetalstothesurfacewaterswerethelikelyexplanationforthesehighervalues.Themaximumseasonalaveragevaluesofdissolvedcopperandzincwerefoundinsummer,reflectinghigheramountsofriverineinputinthisseason.Incontrast,themaximumseasonalaveragevaluesofdissolvedleadandcopperwerefoundinwinterandthelowestonesinsummer,respectively,whichmightbeassociatedwithacombinationoflowconcentrationwithheterogeneousscavenging.ConcentrationsofthesedissolvedmetalsfoundfortheChangjiangEstuaryfallintherangeobservedfortheotherestuariesbutarenoticeablyhigherthanthosefromuncontaminatedrivers,exceptforcadmium.ComparedwithobservationsfortheChangjiangEstuaryinthelasttwodecades,itisclearthattheChangjiangestuarinewatershasbeencontaminatedwithcopper,lead,zincandcadmiumduringChina'sindustrialization,butconcentrationsofthemhavedecreasedinthelastfewyears.

简介：

简介：Lanping-SimaoMesozoic-CenozoicdiwabasinisoneoftheimportantpolymetallicmetallogeneticbeltsinSanjiangarcaUptonow,morethan20mediumandsmall-sizedcopperdepositsand200cop-perorespotshavebeendiscoveredinred-beds(alittleofthemoccurredinPaleozoiestrata).TheymightbeclassificdintothreeorigintyPcs:scdimentary-d

简介：NanofluidswerepreparedbydispersingCunanoparticles(~20nm)inn-tetradecanebyatwo-stepmethod.Theeffectivethermalconductivitywasmeasuredforvariousnanoparticlevolumefractions(0.0001-0.02)andtemperatures(306.22-452.66K).TheexperimentaldatacompareswellwiththeJangandChoimodel.Thethermalconductivityenhancementwaslowerabove391.06Kthanforthatbetween306.22and360.77K.Theinterfacialthermalresistanceincreasedwithincreasingtemperature.Theeffectivethermalconductivityenhancementwasgreaterthanthatobtainedwithamoreviscousfluidasthebasemediaat452.66KbecauseofnanoconvectioninducedbynanoparticleBrownianmotionathightemperature.

简介：TheYongpingcoppcrdepositissituatedinYansbanCounty,JjangxiProviencc,SouthChina.It’sacopper,sulphur,tungstenandmolybdenumpolymetallicdeposit,andhostedbytheCarboniferousvolcanicsedAnentaryrocksinwhicbYanshaniangraniticporphyries(l35-l6lMa)intruded.Ourstud-jesrevealthemajorconstrainingfactoronmetallogen

简介：Cobaltandnickelcomplexes(1a-1dand2a-2d,respectively)supportedby2-imidate-pyridineligandsweresynthesizedandusedfor1,3-butadienepolymerization.ThecomplexeswerecharacterizedbyIRandelementanalysis,andcomplex1awasfurthercharacterizedbysingle-crystalX-raydiffraction.Thesolidstatestructureofcomplex1adisplayedadistortedtetrahedralgeometry.Uponactivationwithethylaluminumsesquichloride(EASC),allthecomplexesshowedhighactivitiestoward1,3-butadienepolymerization.Thecobaltcomplexesproducedpolymerswithhighcis-1,4contentsandhighmolecularweights,whilethenickelcomplexesdisplayedlowcis-1,4selectivityandtheresultingpolymershadlowmolecularweights.Thecatalyticactivitiesofthecomplexeshighlydependedontheligandstructure.Withtheincrementofpolymerizationtemperature,thecis-1,4contentandthemolecularweightoftheresultingpolymerdecreased.

简介：Theaqueouspolymerizationofmethylmethacrylateintiatedbycopperpolypropylene-basedpoly(oxime-imidodiacetate)(P-Cu)-sodiumsulfitesystemhasbeeninvestigated.Theoverallrateofpolymerization(Rp)wasfoundtobeRp=5.8×10^12e^-84.1KJ/RT[MMA]^1.4[P-Cu]^0[Na2SO3]^0.50Amechanismof“coordination-protontransfer”fortheproductionofinitiatingspecieswasproposedanddiscussed.

简介：有bimodal粒子尺寸的钻石/铜composites的热传导性被学习。composites与40和100颗m尺寸钻石的混合物通过液体铜的压力渗入被准备进钻石预先形成。有钻石的不同coarse-to-fine体积比率的预先形成的渗透被调查。有bimodal尺寸分发的钻石/铜composites的热传导性与从Chu开发的一个分析模型导出的理论价值相比。钻石/铜composites能到达更高热的传导性，他们的表面粗糙能被使用bimodal钻石粒子尺寸改进，这被预言。

简介：

简介：氧化物分散加强了铜合金由于他们热、电的传导性，高温度的力量和微观结构稳定性的优秀联合是吸引人的。迄今为止，到他们的制造的state-of-art是内部氧化(IO)过程。在这份报纸，氧化铝分散加强了铜(ADSC)Cu-2.5vol%Al2O3的名字的作文的粉末被反应milling(RM)生产是一个在原处煤气固体的反应过程的过程。为电、机械的性质调查的体积ADSC合金被sintering并且此后获得热挤出。在热巩固过程以后，充分使增加密度的粉末协议能被获得。单个-Al2O3阶段和侧面拓宽效果根据X光检查衍射(XRD)的结果是明显的；ADSC的HRB坚硬能象95一样高；结果应该在铜矩阵在脱臼和谷物边界上被归因于nano-Al2O3的卡住的效果。ADSC合金的电的传导性是55%IACS(国际退火铜标准)。热巩固的材料的房间温度坚硬近似在在900点为1h退火以后被维持

简介：Thesynthesisandspectrophotometricpropertiesof2-(6-methyl-2-benzothiazolylazo)-5-diethylaminophenol(MBTAE),andtheuseofitasaprecolumnderivatizingreagenttoseparateCo(Ⅱ),Ni(Ⅱ),Rh(Ⅲ)andIr(Ⅳ)complexesbyHPLCarediscussed.Whenthemobilephaseconsistsofmethanol/water(90/10Ⅴ/Ⅴ),acetatebufferwithpH4.0and5×10-5mol/LEDTAsolution,thefourcomplexesCanbeseparatedwithin9minonODScolumn.Thedetectionlimits(20μLsamplesize)are0.059ppb,0.062ppb,0.053ppband0.049ppbforCo(Ⅱ),Rh(Ⅲ),Ni(Ⅱ)andlr(Ⅳ)respectivelyatasignal-to-noiseratioof3.

简介：Co-basedcatalystswerepreparedbyusingdielectric-barrierdischarge(DBD)plasmaasanalternativemethodtoconventionalthermalcalcination.ThecharacterizationresultsofN2-physisorption,temperatureprogrammedreduction(TPR),transmissionelectronmicroscope(TEM),andX-raydiffraction(XRD)indicatedthatthecatalystspreparedbyDBDplasmahadahigherspecificsurfacearea,lowerreductiontemperature,smallerparticlesizeandhighercobaltdispersionascomparedtocalcinedcatalysts.TheDBDplasmamethodcanpreventthesinteringandaggregationofactiveparticlesonthesupportduetothedecreasedtreatmenttime(0.5h)atlowertemperaturecomparedtothelongerthermalcalcinationathighertemperature(at500℃for5h).Asaresult,thecatalyticperformanceoftheFischer-TropschsynthesisonDBDplasmatreatedCo/SiO2catalystshowedanenhancedactivity,C5+selectivityandcatalyticstabilityascomparedtotheconventionalthermalcalcinedCo/SiO2catalyst.

简介：

简介：LancangriftwhichliesinthcBao-LangcodomesystemofthcwesternYunandiwaregionisaNS-trending,latePalacozoicriftonthcancientland’smargin.ItswestandcastsidesarerisingblockscomposcdofthcLancangformationaIldXimcngforn1ationofmetamorphicrocks,andbclongtogcosyn-clinestructurallatcr.lnlatcrpa1acozoic,NS-trending

简介：当一些血成分在动脉的墙上积累时，一个真神经病的条件经验丰富得到从墙撤退了，再加入循环系统和凝结发生。在使倾向的体环的一个环形的区域的nanofluid的蠕动的流动上的铜nanoparticles和使倾向的磁场的角色被调查。当其外部试管有正弦曲线自然和内胎的一个波浪的一个体环在它的墙上有块，我们由考虑小动脉代表块模型。润滑油途径被用来简化这个问题。靠近的表格答案为温度和速度侧面被决定。在压力上升的相关参数的影响，压力坡度，速度并且优化图形地被解释。在纯血和铜血之中的比较被介绍并且分析。考虑分析的主要发现是铜nanoparticles的包括扩大速度的振幅的。因此，考虑学习在生物医学的应用起一个主导的作用。

简介：ThreemajortypesofOrdovicianintrusive-relatedgold-copperdepositsarerecognizedincentral-westNewSouthWales,Australia:porphyry,skarnandhighsulphidationepithermaldeposits.ThesedepositsaremainlydistributedwithintwoOrdovicianvolcano-intrusivebeltsoftheLachlanFoldBelt:theOrange-WellingtonBeltandtheParkes-NarromineBelt.AvailableisotopicagedatasuggestthatmineralizationofthethreetypesofdepositsisessentiallycoevalwiththeOrdovicianintrusiverocks(480-430Ma).Porphyrygold-copperdepositscanbefurtherdividedintotwogroups.Thefirstgroupisassociatedwithmonzoniteshowingshoshoniticfeatures,representedbyCadiaandGoonumbla.Thesecondgroupisassociatedwithdioriteanddacite,includingtheCopperHillandCargogold-copperdeposits.GoldskarnisassociatedwithLateOrdovician(430-439Ma)monzoniticintrusivecomplexesintheJunctionReefsarea(Sheahan-Grants,Frenchmans,andCor-nishmens),Endeavour6,7and44,BigandLittleCadia

简介：